Use the following information from a multiple regression
n = 20 b1 = 4 b2 = 3 Sb1 =
1.2 Sb2 = 0.8
a. Which variable has the largest slope, in units of a t
b. Construct a 95% confidence interval estimate of the
population slope, _1.
c. At the 0.05 level of significance, determine whether each
independent variable makes a significant contribution to the regression model.
On the basis of these results, indicate the independent variables to include in
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